I am working on a link port expander for the TI-85, maybe others later. I wanted to know if there is any other port expanders out there. I only know of the I2C one, but I can't find that chip so I decided to design my own. It uses 6 chips (all 74LSXX). thanks Matt Butch ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com